Zobrazeno 1 - 10
of 349
pro vyhledávání: '"Dahm, A. J."'
A new fundamentally-based formulation of nonlocal effects in the rapid pressure-strain correlation in turbulent flows has been obtained. The resulting explicit form for the rapid pressure-strain correlation accounts for nonlocal effects produced by s
Externí odkaz:
http://arxiv.org/abs/0906.2755
Publikováno v:
Phys. Fluids 20, 111703 (2008)
A direct Biot-Savart integration is used to decompose the strain rate into its local and nonlocal constituents, allowing the vorticity alignment with the local and nonlocal strain rate eigenvectors to be investigated. These strain rate tensor constit
Externí odkaz:
http://arxiv.org/abs/0810.3439
Publikováno v:
Physical Review E 77, 026303 (2008)
Local and nonlocal contributions to the total strain rate tensor at any point in a flow are formulated from an expansion of the vorticity field in a local spherical neighborhood of radius R centered on x. The resulting exact expression allows the non
Externí odkaz:
http://arxiv.org/abs/0801.1248
We report a study of edge magnetoplasmons in a partially-screened system of electrons on a helium surface. We compare experimental results with theories of the frequency, damping, and penetration-depth dependence on magnetic field, temperature-depend
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703558
Autor:
Dahm, A. J.
The universal curve for the crossover from ES to screened Mott hopping is used to explain a reported discrepancy between the hopping conductivity prefactors in the two regimes. The prefactor in the screened Mott hopping regime is shown to vary expone
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205193
Autor:
Karakurt, I., Dahm, A. J.
We probe the strength of electron-electron interactions using magnetoconductivity measurements of two-dimensional non-degenerate electrons on liquid helium at 1.22 K. Our data extend to electron densities that are two orders of magnitude smaller than
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205001
We describe a quantum computer based on electrons supported by a helium film and localized laterally by small electrodes just under the helium surface. Each qubit is made of combinations of the ground and first excited state of an electron trapped in
Externí odkaz:
http://arxiv.org/abs/quant-ph/0111029
The damping of quantum effects in the transport properties of electrons deposited on a surface of liquid helium is studied. It is found that due to vertical motion of the helium vapour atoms the interference of paths of duration $t$ is damped by a fa
Externí odkaz:
http://arxiv.org/abs/cond-mat/0007160
Studies of weak localization by scattering from vapor atoms for electrons on a liquid helium surface are reported. There are three contributions to the dephasing time. Dephasing by the motion of vapor atoms perpendicular to the surface is studied by
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912317
Autor:
Rubin, N. A., Dahm, A. J.
A recent experimental Physical Review Letter which claims to prove the existence of the single-electron ripplonic polaron associated with electrons on a helium film is examined. A correct evaluation of the holding field and a restriction of the polar
Externí odkaz:
http://arxiv.org/abs/cond-mat/9709284